Electric glow-lamp.



' No. 832,934. PATENTED OCT. 9, .1906.

- J. VAN VLEGK.

ELECTRIC GLOW LAMP. APPLICATION FILED MAYQ, 1899.

'Tliq: 1.

3 SHEETS-SHEET 1 v INVENTOI? PATENTED OCT. 9, 1906.

J. VAN VLBGK. ELEGTBIO GLQW LAMP APPLICATION FILED MAYO, 1899.

s SHEETS-SHEET 2.

INVENTOI? ATTORNEY No. 832,934. PATENTED 001". 9, 1906. J. VAN VLEGK.

ELECTRIC GLOW LAMP.

APPLICATION FILED MAY 9, 1899.

3 SHEETS-SHEET 3.

have invented new point WQTTED STATES JOHN VAN VLEUK, or NEW ACORPORATION PATENT ornron.

YORK, N. Y.,'ASSIGNOR, BY 'MEsNE'AssIeN- naNrs, ro NERNST LAMP COMPANY,or PITTSBURG, PENNSYLVANIA,

or PENNSYLVANIA."

ELECTRIC GLOW-LAMP.

Specification of Letters Patent.

Patented Oct. 9, 1906.

To a, whom it may concern.-

Be it known that 1, JOHN VAN VLEGK, of and State of New York, and usefulImprovements in Electric Glow-Lamps, of which the following is aspecification.

My invention relates to that class of electric glow-lamps in which thelight is emitted from a body of refractory material which at normaltemperatures is a non-conductor, but which upon becoming heated to acertain becomes a conductorand is thus rendered incandescent by thepassage of the curducting bod rent.

The-mode of organization of my invention consists in combining with sucha non-com a device for heating the same and means -or throwing saidheating device out of operation when said refractory body shall havebeen rendered conducting, also means for varying the proximity of saidheat ing device to said non-conducting body, also means for effectingthe said results, or either features of construction of' them,automatically, and also electromagnetic means for accomplishing thesame.

' My invention further consists in the novel of the lamp-hereindescribed, as more particularly pointed out in the claims.

Int-he accompan ing drawings, Figure 1 is a side elevation o my 1 lamp,the inclosing globe and its holder and the shade being Slit); a insection. Fig. 2 is a vertical section. Fig. 3 is a detail view showingthe mode of attachment of the carrier for the heating device. Fig.-

is bottom view of said carrier. 5 shows the support for the glowerprovided with a detacha le screw cap or cover for ro- Fig. 4.

' Acting the glower during transportation.

Figs. 6 and 7 are electrical diagrams showing the circuit connections.Fig. 6 exhibits the circuits and relations of parts when the lamp is outof operation and Fig. 7- when the lamp is in operation. i

Similar letters and numbers of references indicate like parts.

The term glower hereinafter usedfor brevity means the body of normallynoncondncting material which is raised in tem- 'Jerature by the heater,and thus becomes a conductor permits the passage of. the electricalcurrent .n'ch causes it to glow. The termhheatei hereinafter used meansthe device whereby the glower, normally nonconducting, is elevated intemperature so as to become a conductor of the electrical current.

source of electricity. The connection 0 in' cludes a solenoid (1, havinga movable core 12, which. carries the crossbar f, from which bar dependtwo rodsg h. Between the rods 9 It extends the heater '5, which may be acoil of fine platinum wire. The heater t is placed in such proximity tothe-glowera that theradiation from said heater will bring said glower toa temperature to render it a con-f uctor of electricity. As here shown,the heater surrounds t e glower. The circuit connections from. theheater proceed, as indicated by the dotted lines 7' 7a, through the rods9 h to contact-points Z m, which are on the under side of the cross-barf. Below the contacl'rpoints Z m and secured upon a fixed support,hereinafter to be described, are two s ring-clips a 0, each adapted toreceive one o the contact-points Z m. The clip 'n is electricallyconnected to the connection I). The clip 0 is electrically connected toa branch connection 1), the other end of which branches from theconnection 0 at g. It will be obvious that instead of placing thecontact-points Z m on the cross-bar f and the clips n 0 on the fixedsupport I may reverse their'positions, securing the contact-points onthe fixed support and the clips on the cross-bar.

The operation of the device is as follows: The parts being at startin inthe position shown in Fig. 6, the current lveing established yconnection 1) to clip 0,. thence to the contact-point Z, which isnormally in said clip, to the connection q, to the heater '5, connection7c, contact-point m,- clip a, and return connection b, or vice versa.The current does not originally pass by way of the glower a, beoausesaidglower is a non-conductor. By reason of this passage of the currentthrong it the heater i is brought to a high temperaroceeds from itssource to the connection 0 Referring first to the electrical diagrams,

ture. and its heat is radiated to the glower a m eterisl.

until the tern. sufliciently e eve-ted to enshle it to conduct thecurrent. Then the circuit proceeds from connection 0, through. the coil(1, to glower e and to return connection I). The solenoid d is thusenergized and caused to drew its core a inward and upward. The corecarries the cross-har with it, so drawing the contactoints lm out of theclips n and o rind l)l'6f1.l(- mg circuit at these plnceswhile alsomoving the heater into the position shown in Fig. 7 and shove theglower. The glowcr now he comes brightly incandescent while the heateris cut out and also moved. out of the path of the light-rays proceedinglaterally and downwardly from the glower. The parts remnin as thusdescribed and us shown in Fig. 7 es long as the lighting-current ismaintained. When it is shut ofl, the solenoid is (let-finergized, thecore drops, and the parts resume the position shown in Fig. 6.

I will now describe the features of construction of my lump as shown inFigs. 1 to 5, inclusive, premising that the relative position of theparts in Figs. 1 end 2 is thet which they assume when the lamp is inoperation. or as shown in Fig. 7. 1 is a metal tubular socket internallythreaded at its up er portion to enehle it to hesecured' to t is lsmpfixture or support. The inner periphery of the socket, near its loweropening, is also threaded to receive the cylindrical inclosing case 2.Between the upper edge of the cuse 2 and a shoulder within the socket isreceived the up J61 flange 3 of the hohhin which supports t ie coil cl.Secured to the flange 3 by the screws 6 (dotted. lines) is at our 7, olinsulnting material, having hinding-srrews 5 end 8, to one of which, 5,is connected the leading in wire I). The other binding-screw 8 may havea return-wire connected toit; hut in the present instance the case ofthe lamp is grounded, us will hereinafter he descri )ed, and thereforethe binding-post 8 is not used. Within the coihhohhin is the core a, tothe outer end of which is secured by the screw 9 (dotted lines) theClOSS-l'utlf, of insulating Secured to said cross-hinare the metal rods9 it, here also servin the coin neotions j it of Figs. 6 end 7. 5n theunder side of the cross-her fare two metal plates ll and 12, throughwhich the rods'gii pass and which are secured in place by the nuts 13end 14 on said rods. The plates it end 12 cerr the contact-points 2 m.The rods 9' 72- extend through openings in the iixcd support l 5, olinsulating material. This support l5 li .s in e flanged collar 16, whichis screwed upon the lower end of the cylindrical case .2. Beneat h thesupport 15 and between the seme and the lower flange 17 of said collaris the llengc its of e tuhulsr socket 4, through openings in which therods 9 It also pass. ()n the upper side of the support 15 are the metalspringclips 0 n, end from clip "n a, wire 20 extends ereture oi saidglower hccomes see,

said support and terminates in a.

through Another wire 19 also exspirel spring- 22.

tends through support 15 end terminates below in s. sin'ulnr spiralspring 21. 323 is e cylinder, .which may he or insuhitim material,having on its upper side meter.

contact-plates 24 25. llleta-llic conductors .26 27 extend from theseplates through the cylinder 23. They then pass through supporting-rodsQS'endQQ and curry between them the glowcr (IS. The cylinder 23 fits inthe socket 18 end can be readily inserted and removed. It is provided onits periphery with s fixed stud or pin 30, Fig. 1, which when thecylinder is introduced into the socket passes tl'irough the verticalportion of n slot 31 therein. The cylinder is then rotuted to bring thepin. into the ln'irizontul portion of the slot, and is thus dcteclnihlyse cured in place, end is so shown in Fig. ft. When the cylinder .23 isthus edjusted, the contact-plates 2e and 1.25 beer against and slightlycompress the springs .21 rind 323, so that electrical Trcuit is thusmade from. the wires l9 nude 20, through. the conductors 26 end 27, tothe glower a. 32, Figs. 3 and i, is it carrier-her, of chins or otherouitehledre suleting material, having an opening 33. Extending throughthis her near each extremity are metal pins 34 and which terminnl'rsshove the her in a spring clip 36 37. Uurrounding the pins and and belowthe our 32 are corrugated sleeves 35% 32?, of insulating material. Thepins receive the metal washers ill 4'1 412 1-3. The sleeves aresecurcdin place by nuts 44 45, up plied to the threaded lower ends ofthe The heater is. coil of fine pletinum wire which is wound around thesleeves 33 and 39 so that its parts he in the corrugations thereof. (hieterminal of the coil may connect, for example, to the metal washer 40 onpin 34 end the other terminal to metal washer 4'3 on pro 35. The washers4O 41 42 43 may he perimrnently secured to the sleeves 38 and- 3%). 'lhelower ends 46 of the rods 9 h are cnlnrged and globular in for1n,so asto enter and be grasped hy the spring-clips 36 37. In this wiiy thecarrier 32, with its associated parts, is dctirchn'oly supported uponthe lower ends of said rods. Referring now to l and 2, the lower portionof the periphery of the hinged collar 16 is thresd ed to receive theglobe-supporting socket 47. Between thruppcr edge of this socket and e.flange on the roller 16 is held the ring 4r in which the releetingyshede 49 is secured y set-screws, as 50, in the usual wey. Theglobe-socket is provided witl'i eir-openings 51, end the globe may hesccuredto said socket by cement or any other suitable meens. in theglobe 52 l. provid c en opening 53, through which air may enter andsubsequently escape through the ventileting-openings 51. (in

the exterior of the cylinder 23 is shown it 35 results achieved throuscrewthread 54, the v i receive a screw-cap 55, Fig. 5, thepurpose ofwhich ap is to diagrams, Figs. 6 and 7;.

.n, and wire tend down through glower, so that the "2 1, contact-platepurpose of which is to I protect the glower during transportation. heelectrical connections in the specific form of-lamp described are to'made in any suitable way in accordance with the explanation alreadygiven and the Specifically they may be traced on Fi 2 as follower-bywire 0 to binding-postfi .through the core to wire 19,

' lained in connection with the diagrams;

he rods 28and 29, carrying the glower, exthe opening '33 in the car-'within the heater-coil. The current first raises the temperature of theheater, and

when the heater in turn raises the temperature of the glowersufficiently for the current to pass then the carrier-bar 32 isautomatically raised, bringing the heater above the light-rays of thelatter are unobstructed below and for a certain disp for p'acki tanceabove a gitudinal axis.

I will now point out certain advantageous gh this construction. First.The bar. 32, with the heater carried thereby, is readily-removable fromtherest of the lamp by snnpl drawing the springclips 36and 37; 'from t elobular ends 46-01 the rods 9 k. Theheater 1,.with its sup orting-sleeves 38 and 39', can be taken oii .the pins 34 and 35 by removingthe nuts 44 and v The pins 34 and 35 can readily then be drawn out ofthe cross-bar 32. This arrangement permits of the-removal of the heaterduring transportation and also the easy su titution of a new heater-forone thatmay have placement of any other portion associated with theheate v Second. The, cylinder 23,. c' ing the glower, is readilyremovable from t e socket 4, so as to permit ofthe substitution of a newcylinder and glower when desired. The pro tlecting-cap may be applied tothe cylinor plane passing throughits loneither while it remains in thesocket 4 (the bar 32 being removed) or when it is out of the socket.

Third.- By removing the collar 16 the block 15 and cylinder-socket 4become i'ree. Fourth. The upper socket 1 is easily detachable to exposethe solenoid. v

- rier-bar 32, so. that said glower lies normally 5 become. injured orthe re.

having enlarged ends, 46, carrier bar-f supported .openiee's in saidblock,

'77 In brief, the entire construction is such that all the parts areeasily taken asunder to permit of repairs or substitutions and moteeconomy of manufacture. 1

claim- 1. The combination in the solenoid d, thecore 'c, the rods 9 andit supported by. said core, carrier-bar 32 c rie by said rods and havingto pros iixed-glower a 1 extending through saidopen 2. The combinationin an electric lamp, of the solenoid d, the cores, rods g and h supported by the said core, carrier-bar 32 carried by said rodsand havingan opening 33 the heater i in coil form supported by sai. carrier-bar,and the fixed lower a extending thriough said opening an into saidbeaten CO1 an. electric lamp, of v an opening 33, 4 "heater 't carr edby the said oanienbar, and

3. The combination in an electric lamp of the type herein s *cified, ofthe ion nally-movable ro detachably secured carried by said bar.

4. The combination in an electric lamp of the type herein specified, ofthe carrier-bar tudi thereto, and a heater '32,- pins 34 and 35 therein,insulatingeicevcs 38 and 39 on said pins, anda heater-coil '5' carriedby. said sleeves.

5. The combination the t in an electric lamp of herein. specified,of'thc rods g and 7:, ar 32, spring-clips 36and 37 on one side of thesaid her adapted to receive said enlarged ends, and a heater 6 carriedon the other side of said ban 1 6. The combination in an electric lamp,of the socket I, cylindrical case 2, flanged collar 16, the solenoid dhaving the core e, carrierby the said core, block 15, rods in, extendingfrom said bar through the heater i carried by said rods 9, h, and thetubular socket 4 receiving the. cylindrical support 23,-and the glower acarried by connections.

.7. In combination with a glower carried thereb eater surrounding saiglower, a cap adapted to fit upon said support and coversaid glower whensaid heater 1B removed,- substan tially as described.

8. In an electric lamp of the type herein specified, a heater, adetachable support t erefor and means for detachably securing saidsupport, and circuit and .a detachable said heater-to said support,substantially as described. I v I JOHNVAN VLECK'. "Witnesses; I v

Jos. WlLLLtMs,

R. MULLER.

support, a fixed g and h, carrierat 32

